Box-column-type upright drill



D. c. KLAUSMEYER BOX COLUMN TYPE UPRIGHT DRILL Sept. 4, 1928. 1,682,844

Filed June 4, 1925 2 Sheets-Sheet 1 D. c. KLAUSMEYER BOX COLUMN TYPEUPRIGHT DRILL Sept. 4, 1928.

Filed June 4, 1925 Z-Sheecs-Sheet 2 Patented Sect 4,

UNITED STATES 1,682,844 PATENT UFFlCE.

DAVID C. KLAUSMEYER, 01E C'Il lCINIwTATL '03- T. ASQJZGN'OTR TO THECINCINNATI BICK- FORD TOOL GOIHPANY, 0F GINUL'El'JlTA'lI, OHIO, ACORPORATION 01 OHIO.

Application filed June 4, 1925.

My invention is concer ed with drilling machines and isparticularly,conce *ned with upright drillingmachines having hoe:columns.

In a drilling machine of the upright type it is oesira-bie to operatethe machine by means of a motor mounted on the top of the column orframe. Moreover in a. drilling machine of the above indicated type,having a box column, it is desirable to have the motor mounted as nearas possible to the centre line of the box column. The position of themotor on the clumn is controlled to a large extent by the gearingconnection lOBlZiVGOll the motor and the drill spindle.

One of the important features of my invention is to construct a drillingmachine so as to permit the mounting oi the propelling motor on the topof the column near the centre line thereof. Moreover it is an importantfeature of my invention to simplify the gearing connection between themotor and the drill spindle.

In a drilling machine constructed in accordance with myinvention, a workcarryinn table and a drill head are adjuetably and slidably mounted onthe side of a box column. lit the top of the hon: column. is mounted thepropelling; motor and a casing for carrying the gearing connectionbetween the motor and the drill spindle. The gearing; carried in the cacomprises a backg 'ear sleeve and a reversing sleeveboth of whichsleeves are aliened with the drill spindle. ll. baclcg ear shaftprovided for connecting the reversing: sleeve to the bacl -t car slcevcf'iho reversing sleeve is directly connected to the motor through aflexible joint and isprovided with means for reversing; the direction ofits rotation at will. fit the upper end ot the reversing: sleeve and thebacle gear shaft is provided a transposition gear mechanism which in ybe operated to obtain dil'fcrcntspeeds. Suitable change gears are prmidcd for connecting the lower end of the V shaft to the baclogrearsleeve whereby additional speeds are obtained. The lJfLi'lPQt-atl sleevesplined to the drill spindle and the reversingsleeve permits freerotation and linear movement of the spindle within it. By reason ofhaving the baclegear sleeve and the reversing sleeve, which are in thenature of shafts, aligned with the drill spindle it is possible to mountthe propelling motor closer to the main spindle, Accordingly, it is pos-Serial lilo. 84,829.

sible to mount the motor very close to the centre line of the column andnot to support the motor on a bracket projecting from the side of thecolumn. The above construction also sunphhcs the connection between themo tor and the main spindle.

The back gear shaft, which connects the reversing sleeve to theback-gear sleeve, operates a pump for supplying lubricating material tothe mechanism connecting the propelling motor to the drill spindle. Thepump is preferably connected to the lower end of the bacltgear shaft andhas an inlet opening connected to a well formed in the bottom of thecasino; surrounding the sleeve and the back-gear shaft.

@ther objects and advantages *il] be in part indicated in the following;description and in part rendered apparent therefrom in connection withthe annexed drawings.

To enable others skilled in the art so fully to apprehend the underlyingfeatures hereof that they may embody the same in the various wayscontemplated by this invention, drawings depicting a preferred typicalconstruction have been annexed as a part of this disclosure and in suchdrawings, like characters of reference denote corresponding partsthroughout all the views. of which Figure 1 is an elevational View of adrilling;- machine constructed in accordance with my invention. Fig. 2is a sectional view through the gearing connection between the motor andthe drill spindlel ii is a section through a portion of the lubricating1111111. A main propelling motor 6 mounted on a bracket 7', which issupported on the top of the column 1, and a rear casino; 8 is mounted ona bracket 9 which is supported on the top of the column. In referring to1 of the drawings, it will be noted the motor 6 is mounted near thecentre line or" the column 1 and does not project over the side of thecolumn to any great extent as in the case of many drilling machinesnowconstructed. 4

Referring to 2 of the drawing, a reversing sleeve 10 and a back-gearsleeve 11 d on the column 1 and the tool head 5 is are shown alignedwith the drill spindle 12. The drill spindle 12 is carried by the drillhead 5 and projects through the two sleeves and 11. The drill spindle 12is slidable and rotatable with respect to the sleeve 10 whereas thebaclegear sleeve 11 is splined to the spindle. In Fig. 2 of the drawingsthe baclegear sleeve 11 is shown connected to the spindle 12 by means ofa spline 13. A bracket 14, which is secured to the casing 8 by means ofbolts 15, carries a bearing 16 servlng as a journal for one end of thereversing sleeve 10. A second bracket 17, which is secured to the casing8, carries a bearing 18 serving as a journal for the lower end of thereversing sleeve. The bracket 17 also carries a bearing 19 forjonrnaling the upper end of the backgear sleeve 11. A third bracket 20,which is secured to the casing 8, carries a bearing 21 for journalingthe lower end of the back-gear sleeve 11. V a

The reversing sleeve 10 carries a reversing mechanism which comprisestwo bevelled gear wheels 22 and 23 rotatably mounted on the sleeve.Between the two bevelled gear wheels 22 and 23 is interposed a bevelgear wheel 24: which is secured to a short shaft25. The gear wheel 24meshes with the two gear wheels 22 and 23 and serves to rotate the gearwheels 22 and 23 in opposite directions. The gear wheel 22 is mounted ona collar 26 and the gear wheel 23 is mounted on a collar 27. The collars26 and 27 are rotatably mounted on the reversing sleeve 10 and areadapted to be connected to the sleeve by means of friction clutches 28and 29. The two friction clutches 28 and 29 are controlled by a cam rod30 which slides in a slot formed in the reversing sleeve. Near the endsof the cam rod 30 are formed cam surfaces 31 and 32. The cam surfaces 81and 32 respectively operate pins 33 and 34 for controlling the frictionclutches 28 .and 29. The friction clutch mechanism is described andclaimed in my co-pending application Serial #805, filed January 6, 1925.Accordingly a detailed description of such mechanism in this applicationis deemed unnecessary. The cam rod 30 is secured to a collar member 37by means of set screws 38. The collar member 37 is slidably mounted onthe sleeve member 10 and is positioned between the two bevel gear wheels22 and 23.

The collar member 37 is operated by means of a lever 40 which ispivotally mounted on the casing S. A segment 41 having detents ornotches 42 formed therein is provided on the lever 40. A plunger 43,which is operated on by a spring 44, is provided for engaging thedetents or notches 42 formed in the segmental plate 41. The plunger 43serves to hold the collar 37 in position to rotate the sleeve 10 eitherin a forward or in a reversed direction. The lever 40 is provided withsuitable means for engaginga groove formed in the collar 37 andaccordingly upon operation of the lever 10 the cam rod 30 is shifted tooperate either the clutch mechanism 28 or the clutch mechanism 29. Uponoperation of the clutch mechanism 28 the gear wheel 22 is connected tothe sleeve 10 and upon o 381- ation of clutch mechanism 29 the gearwheel 23 is connected to the sleeve 10. By such means the direction ofrotation of the reversing sleeve is controlled.

The short shaft 25, which carries the bevel gear wheel 21 and which isconnected to the motor 6 is ournalcd in two bearings 46. The bearings 46are suitably carried by the collar +17 which is supported in the casing8. The short shaft 46 is connected to the motor shaft 48 by means of aflexible connection 49. The flexible connection 49 comprises a collar 50which is secured to the short shaft 25 and a collar 51 which is securedto the motor shaft 48. A plurality of'pins 52 are mounted on the collar50 and similar pins 53 are mounted on the collar 51. The pins 52 and 53project through a collar 54 which is loosely mounted on the motor shaft48, as shown in Fi 2 of the drawings. By such means a flexib econnection is provided between the driving motor and the short shaft 25.

A back-gear shaft 55 is mounted in the gear case 8 parallel to the drillspindle 12 and adjacent to the sleeve members 10 and 11. The upper endof the back-gear shaft 55 is journaled in a bearing 56 which issupported in the bracket 14. The lower end of the backgear shaft isjournaled in a bearin 57 which is supported in the bracket 20. The upperend of the back-gear shaft is connected to the upper end of thereversing sleeve 10 by means of two transposition gears 58 and 59. Thetransposition gear wheel 58 is splined to a sleeve 60 which is securedto the back-gear shaft 55. The transposition gear 58 comprises twocircular rows of gear teeth 61 and 62 which have teeth of the same pitchbut different in number. The transposition gear 59, which is splined tothe reversing sleeve 10, is provided with two circular rows of gearteeth 63 and 64. The circular rows of gear teeth 63 and 64 have the samepitch as the teeth on the transposition gear 58. The circular row ofgear teeth 64 on the transposition gear 59 is adapted to mesh with thecircular row of gear teeth 62 on the transposition gear 58 for operatingthe back-gear shaft 55 at one speed. When it is desired to operate theback-gear shaft 55 at a different rate of speed the position of thetransposition gear 58 is reversed on the sleeve 60 and the position ofthe transposition gear 59 is reversed on the reversing sleeve 10. In thereversed position of the two transposition gear wheels the row of teeth63 on the transposition gear 59 meshes with the row of geared teeth 61on the transposition gear 58. Further changes in speed may be obtainedby interchanging the posit-ion of the gears 58 and 59. The transpositiongear wheels shown in this application are disclosed and claimed in thecompanion application of George E. Merryweather, Serial No. 37,468 filedJ rule 16, 1925.

Near the lower end of the back-gear shaft 55 are mounted two gear wheels(36 and 67. The gear wheels 66 and (57 form a part of a change gearsystem for connecting the backgear shaft to the back-gear sleeve 11. Thegear wheel 67 meshes with a set of external gear teeth 68 which areformed on a gear member 69. The {.Z'Gtll member 69 is rotatably mountedon a bushing 70 which is mounted on the baclcgcar sleeve 11. The gearmen'iber 69 is also provided with a set of internal clutch teeth -71.The intermilclutch teet-hTl are adapted to mesh with a setof clutchteeth 72 on a shiftable gear member 73. The gear mei'nber 73 alsocarries a second set of gear teeth Tel which are adapted to be movedinto mesh with the gear teeth on the gear wheel 66. The gear member 73is splined to the back-gear sleeve 11 and is shiftable along the sleevemember to meshthe gear teeth 74 with the teeth on the gear wheel 66 orto mesh the clutch teeth 72 with the clutch teeth 71 on the gear member69. A lever 76, which is pivotallv mounted on the casing 8, is providedfor moving; the member 73 along the sleeve member 11. The lever 76 isprovided with a plate 77 in the form of; a segment which has detents ornotches 78 formed therein. The detents or notches 78 are engaged by aspring pressed plunger 79 to exert a force tending to hold the lever 7 6in one of its operative positions.

A gear wheel 81, as shown in Fig. 2, is mounted on the drill spindle 12.The gear wheel 81 is connected through a set of gearing not shown butcontained in a gear casing 82 to the feed shaft The feed shaft 83 in awell known manner controls the feeding movement during power feedingoperation. Inasmuch as my invention is not particularly related. to thefeeding mechanism and inasmuch as said mechanism is well known a furtherdescription thereof is deemed unnecessary.

The back-gear shaft 55 operates a pump for supplying lubricatingmaterial to the niecl'ianism contained within the casing 8. The pump 90comprises a casing 91 which is supported by thebraclwt 20 in anysuitable manner. The rotor of the pump is mounted on a shaft 99 which issecured to the backp ear shaft The pump is provided with an inlet 93 andan outlet 94. The outlet 94 is connected by a conductor 95 which leadsto so the top of the casing 8 and connects with a discharge pipe 96. Thedischarge pipe 96 is provided with openings 97 for spraylng lubricatingmaterial over the mechanism contained in the casing 8.

A well 98 isformed in the bottom of the casing for collecting thelubricating material supplied to the mechanism in the casing 8. Theinlet 93 for the pump is connected with the lubricating material in thewell and preferably the pump 90 projects into the lubriatihg material inthe well as shown in Fig. 2 ofthe drawings. The well 98 is provided witha projecting portion 99, as shown in Fig. 3, having an inlet 100 forsupplying, lubricating material to the well and an outlet 101 fordraining the lubricating material when necessary. i

In the above described mechanism it will be noted the providing of agearing system having a reversing sleeve and a hack-gear sleeve alignedwith the drill spindle not only serves to simplify and reduce the amountof gearing but also permits the movingof the motor much closer to thedrill spindle. Accordingly it is possible to mount the propelling motorvery close to the centre line ofthe box column of the machine. Attentionis also called to the simplified means for eficctingdiiferent speedchanges of the main drilling spindle.

Without further analysis, the foregoing will so fullyreveal the gist ofthis invention that others can, by applyingcurrent knowledge, readilyadapt it for various utilizations by retaining one or more ofthefeatures that, from the standpoint of the prior art, fairly constituteessential characteristics of either the generic or specific aspects ofthis invention and, therefore. such adaptationsshould be, andareintended to be, comprehended within the meaning and range of equivalencyof the following claims Having thus revealed this invention, I claim asnew and desire to secure the following combinations and elements, orequivalent-s thereof, by Letters States:-- 1. In an upright drill, thecombination comprising a drill spindle having a backgear sleeve and areversing sleeve aligned therewith, said back-gear sleeve being splinedto said drill spindle; a baclcgear shaft having an operative connectionto the reversing; sleeve at one end thereofand anoperative connection tothe back-gear sleeve at the opposite end thereof, said connections tothe back-gear shaft being constructed to provide changes in speed; and amotor connected to the reversing sleeve. i

2. In an upright drill. the combination comprising a drill spindlehaving a backgz'ear sleeve and a reversing sleeve aligned therewith,said back-gear sleeve having a spline connection with said spindle; abaclc gear shaft having an operative connection to said reversing sleeveandto the back-gear sleeve; a reversing mechanism mounted on saidreversing sleeve; and a motor connected to said reversing mechanism.

3. In a drilling machine, the combination Patent of the Unitedcomprising a drill spindle; a shaft arranged parallel to the spindle;first and second rotatable elements aligned with said spindle; a motorconnected reversibly with the first rotatable element;a drivingconnection between the second rotatable element and said spindle; amultiple-speed driving connection between the motor driven element andsaid shaft; and means for connecting said shaft to the second rotatableelement to rotate said element and thereby the spindle at differentspeeds and in forward and reverse directions.

4. In an upright drilling machine, the combination comprising a drillspindle; a motor; a set of bearings aligned with said spindle; a set ofbearings located in one line paral. lel to said spindle; and meansincluding speed change gearing supported in said bearings and rotated bysaid motor for rotating the spindle at different speeds in both forwardand reverse directions.

5. In a drilling machine, the combination comprising a drill spindle; amotor; a set of bearings aligned with said spindle; a set of bearingslocated in a line parallel to said spindle; and means, including twospeed change devices of which one is adapted to multiply thespeedsprovided by the other, operating in said bearings and rotated by saidmotor for rotating the spindle at different speeds. i

6. In a drilling machine, the combination comprisinga drill spindle; amotor; a set of bearings aligned with said spindle; a set of bearingslocated in a line parallel to said spindle; and means comprising shaftsoperating in said bearings and rotated by said motor and two speedchange devices of which one is adapted to multiply the speeds providedby the other, for rotating said spindle at eight different speeds in aforward and in a reverse direction.

7. In an upright drilling machine, the combination comprising a mainframe having a motor mounted on the upper part thereof; aback-gearsleeve; a vertical spindle having a spline connection with saidback-gear sleeve; a reversing sleeve aligned with said spindle; areversing mechanism mounted on said reversing sleeve and connected tosaid motor; a back-gear shaft; means comprising transposition gears forconnecting the reversing sleeve to the back-gear shaft to effect speedchanges; and means comprising change gears for connecting the back-gearshaft to the back gear sleeve to effect speed changes.

8. In an upright drilling machine, the comhination comprising a mainframe having a motor mounted thereon; a drill spindle; a back-gearsleeve and a reversing sleeve aligned with said drill spindle. saidback-gear sleeve being splined to said Spindle; two bevel gear wheelsmountedon the reversing sleeve and selectively connected to it for controlling the dircctionof rotation of the spindle; a motor gear meshingwith said bevel gears and connected to said motor by a flexibleconnection; and means comprising a back-gear shaft for connecting thereversing sleeve to the back-gear sleeve.

9. In a drilling machine, the combination comprising a drill spindle; aback-gear sleeve and a reversing sleeve aligned with said drill spindle,said back gear sleeve being splined to the spindle; power means forrotating the reversing sleeve in a forward and in a reverse direction; aback-gear shaft mounted adjacent to said drill spindle; and means forconnecting the reversing sleeve to the back-gear sleeve through saidback-gear shaft to rotate the spindle at various speeds in a forward andin a reverse direction.

10. In a drilling machine, the combination comprising a drill spindle; aback-gear sleeve and a reversing sleeve aligned with said drill spindle,said back-gear sleeve being connected to rotate with said spindle; powermeans for rotating the reversing sleeve in a forward and in a reversedirection; a back-gear shaft located parallel to said spindle; transosition gears for connecting the reversing s eeve to the back-gearshaft; and change gears for connecting the back-gear shaft to thebackgear sleeve.

11. In an upright drilling machine, the combination comprising a boxcolumn, a motor mounted on the top of said column; a drill head movablealong said column and having a drill carrying spindle mounted thereon; acasing mounted on the top of the column adjacent to said motor; aback-gear sleeve and a reversing sleeve aligned with said spindle andcarried by said casing; means comprising bevel gear wheels forconnecting the motor to the reversing sleeve to rot-ate the latter in aforward and in a reverse direction; a back-gear shaft; transpositiongears for connecting the reversing sleeve to the back gearshaft; andchange gears for connecting the back-gear shaft to the backgear sleeveto operate the spindle in a forward and in a reverse direction atdifferent speeds.

12. In an upright drilling machine, the combination comprising a boxcolumn; a motor mounted at the top of said column; a drill spindle; aback-gear sleeve and a reversing sleeve aligned with said spindle;reversingmechanism mounted on said reversing sleeve and connected tosaid motor for controlling the direction of rotation of the spindle; anda back-gear shaft for connecting the reversing sleeve to the back-gearsleeve.

13. In a drilling machine, the combination comprising a drill spindle; aback-gear sleeve direction; a back-gear shaft located parallel to thespindle; transposition gears for connecting the reversing sleeve to theback-gear shaft to operate the back-gear shaft at ditlerentspeeds; andchange gears for connecting the back-gear shaft to the baclegear sleeveto operate thespindle in a forward and in a reversedirection atdifierent speeds.

14. In a drilling machine, the combination comprising a drill spindle; areversing sleeve aligned with said spindle; a motor for operating thereversing sleeve in a forward and in a reverse direction; a back-gearshaft; transposition gears for selectively operating the back gear shaftfrom the reversing sleeve at different speeds; a back gear sleeve havinga spline connection with said spindle; and change gears for connectingthe back-gear shaft to the back gear sleeve to effect operation of thespindle at different speeds with respect to the back gear shaft.

15. In a drilling machine, the combination comprising a drill spindle; areversing sleeve aligned with said spindle; two reversing bevel gearwheels rotatably mounted on said reversing sleeve; a motor gear wheelmeshing with said reversing gearwheels; a main motor; a flexibleconnection for joining the motor to said motor gear wheel; a changespeed connection between said reversing sleeve and the spindle; and afriction clutch mechanism for selectively connecting the reversing gearwheels to the reversing sleeve.

16. In a drilling machine, the combination comprising a drill spindle; areversing sleeve aligned with said spindle; two reversing bevelgearwheels rotatably mounted on said reversing sleeve; a motor gearwheel meshing with said reversing gear wheels; a main motor; a flexibleconnection for joining the motor to said motor gear wheel; a changespeed connection between said reversing sleeve and the spindle; a collarrotatably mounted on said reversing sleeve between the reversing gearwheels; a cam rod operated by said collar; and friction clutchesoperated by said cam rod for selectively connecting said reversing gearwheels to the reversing sleeve.

17. In an upright drill, the combination comprising a box column havinga motor mounted on the top thereof; a baclegear sleeve and a reversingsleeve aligned with each other and mounted on said column; a drillspindle having a spline connection to the back-gear sleeve; a back gearshaft for connecting the two sleeves to effect changes in speed betweenthem; two reversing gears rotatably mounted on said reversing sleeve; asliding collar mounted on the reversing sleeve between the reversinggear wheels; means 1 erated by said collar for selectively "connectingsaidreversing gear wheels to the reversing sleeve; a motor gear wheelmeshing with said reversing gear wheels; and a motor connected to themotor gear wheel.

sleeve aligned therewith; two reversing gear wheels rotatably mounted onsaid reversing sleeve; a sliding collar mounted on the sleeve betweenthe two reversing gear wheels; means operated by said collar forselectively connecting the reversing gear wheels to the reversingsleeve; a motor gear wheel meshing with each of said reversing gearWheels; and a motor connected to said motor gear wheel. 19. In adrilling machine, the combination comprising a drill spindle having areversing sleeve aligned therewith; two reversing gear wheels rotatablymounted on said reversing sleeve; a sliding collar mounted on saidsleeve between the two reversing gear Wheels; means operated by saidcollar for selectively connecting the reversing gear wheels to the reversing sleeve; a motor gear wheel meshing with each of said reversinggear wheels; a motor connected to said motor gear wheel; and means forconnecting the reversing sleeve to the spindle so as to operate thespindle at varying speeds.

20. In a drilling machine, the combination comprising a drill spindlehaving a reversing sleeve aligned therewith; two reversing gear wheelsrotatably mounted on said reversing sleeve; a sliding collar mounted onsaid sleeve between the two reversing gearwheels means operated by saidcollar for selectively connecting the reversing gear wheels to thereversing sleeve; a baclegear shaft; transposition gearing for operatingthe back-gear shaft at diiferent speeds by the reversing sleeve; aback-gear sleeve having a spline connection with said spindle; changegears for connecting the back-gear shaft to the back gear sleeve; amotor gear Wheel meshingwith each of said reversing gear wheels; and amotor connected to said motor gear wheel. a

21. In an upright drill, the combination comprising a drill spindlehaving a backgear sleeve and a reversing sleeve aligned therewith, saidback-gear sleeve being splinemjl to said drill spindle; a baclegearshaft hav-v ing an operative connection to the reversing sleeve at oneend thereof and an operative connection to the back-gear sleeve at theopposite end thereof, said connections to the back-gear shaft beingconstructed to provide changes in speed of the drill spindle; a casingfor supporting said sleeves and the bar gcar shaft; a lubricating wellformed in the bottom of said casing; and a lubricating pump secured tothe baclegear shaft and projecting into said lubricating Well.

22. In an upright drill, the combination comprising a drill spindlehaving a backgear sleeve and a reversing sleeve aligned therewith, saidback-gear sleeve being con nectcd to said drill spindle; a hack-gearshaft having an operative connection to the re versing sleeve at one endthereof and having an operative connection to the back-gear sleeve atthe opposite end thereof; a casing surroundin said sleeves and thebackear shaft; a lubricating well formed in the bottom of said casing,and a lubricating pump secured to and operated by said back-gear shaft,said pump projecting into the lubricating well in the easing.

23. In an uprightdrill, the combination comprising a drill spindle; amotor for operating said spindle; mechanism comprising a back-gear shaftfor connecting the motor to the spindle; a casing for enclosing saidmechanism and having a lubricating well formed in the bottom thereof;and a pump secured to said back-gear shaft and projecting into said wellfor supplying lubricating material to said mechanism.

24. In an upright drill, the combination comprising a drill spindle; amotor for operating said spindle; mechanism comprising a verticalback-gear shaft for connecting the motor to the spindle; a casing forenclosing and for supporting said mechanism; a lubricating well formedin the bottom of said casing; a lubricating pump secured to the bottomof said back-gear shaft and projecting into said well; and a fluidsystem for carrying lubricating material from said pump to saidmechanism.

25. In an upright drill, the combination comprising a drill spindle; amotor for operating said spindle: mechanism comprising a back-gear shaftfor connecting the motor to the spindle; a casing for enclosing and forsupporting said mechanism; a lubricating well formed in the bottom ofsaid casing; a lubricating pump. secured to and operated by saidback-gear shaft, said pump projecting into said lubricating well; and anoutlet pipe connected to said pump and extending to top of said casingfor delivering lubricating material over said mechanism.

26. In an upright drill, the combination comprising a drill spindle; amotor for operating said spindle; mechanism comprising a back-gear shaftfor connecting the motor to the spindle; a casing for enclosing saidmechanism; a lubricating well formed in the bottom of said casing; apump operated by said back-gear shaft; and an inlet port for said pumpconnected to the lubricating material in said well.

27. An upright drill combining a spindle; a prime'mover means actuatedby said primemover for rotating said spindle in forward and reversedirections at a plurality of speeds, said means including a forward anda reverse drive and a plurality of speed change mechanisms, of which oneis adapted to multiply the number of speeds provided by the other,operatively connecting the prime-mover with the spindle.

28. An upright drill combining a spindle;

a prime mover; a rotatable member; means selectively to give said memberforward and reverse rotations from said prime-mover; and a plurality ofspeed change mechanisms, of which one is adapted to multiply the numberof speeds provided by the other, operativelv connecting said rotatablemember with sai spindle, said spindle, rotatable member and speed changemechanisms being arranged on only two axes. a

29. An upright drilling machine combining a column; a casing and adriving motor supported upon said column; a tool spindle rotatablyjournaled in said casing; a driving gear journaled in said casingco-axial with the driving motor shaft; means actuated by said drivinggear for rotating said spindle in forward and reverse directions; and aflexible connection between said motor and said driving gear.

30. An upright drill combining a column; a supporting bracket providedby said col- 1min; a plurality of bearing brackets secured upon saidsupporting bracket; a plurality of aligned bearings provided by saidbearing brackets andarranged on two parallel axes; a reversing sleevejournaled in two of said bearings; a back-gear sleeve journaled in twoof said hearings in alignment with said reversing sleeve; a back-gearshaft journaled in two of said bearings parallel with the axes of saidsleeves; a spindle splined within said back-gear sleeve; means to rotatesaid reversing sleeve in forward and reverse directions; and back-gearmechanism acting through said back-gear shaft to transmit to saidspindle the forward and reverse rotations of said reversing sleeve atany one of a plurality of speeds.

31. An upright drill combining a spindle; a reversing sleeve rotatablyjournaled coaxial with said spindle; a second sleeve arranged coaxialwith said spindle and having a driving connection therewith; meansselectively to rotate said reversing sleeve in forward and reversedirections; and means to transmit to the second sleeve at varying ratesthe rotations of said reversing sleeve.

82. An uprightdrill combining a spindle; two gears rotatably journaledcoaxial with said spindle; means to rotate said gears in reversedirections; a sleeve arranged coaxial with said spindles and havingadriving connection therewith, and means including speed change gearsfor selectively connecting either of said two gears with said sleeve torotate said sleeve and thereby the spindle at a plurality of rates fromeither of said reversely driven gears.

33. An upright drill combining a spindle; a prime-mover; a memberrotatably journaled coaxial with said spindle; means to give said memberoppositely directed rotary motions by said prime-mover; a sleevesurrounding said spindle and having a driving connection therewith; andspeed change mechanism operatively connecting said rotatable member withsaid sleeve to give the sleeve and thereby the spindle oppositelydirected rotary motions at a plurality of rates from a single rate inthe prime mover.

A drilling machine combining a drill. spindle; a prime mover; forwardand reverse driving mechanism mounted coaxially with said spindle; adriving connection between said prime mover and said mechanism; anelement rotatably mounted adjacent said spind e; change speed gearingconnecting said forward and reverse mechanism to drive said element; andchange speed gearing connecting said element to drive said spindle.

In Witness whereof, I have hereunto subscribed. my name.

DAVID C. KLAUSMEYER.

